JPH0520926U - Front fall prevention mechanism for foldable seat back - Google Patents

Abstract

(57) [Abstract] [Purpose] To prevent the tilting of the retractable seat back in the middle and to use the back and back of the seat back as a luggage platform. [Structure] A fixed frame (3) is provided with a rotating member (6) having a central portion rotatably pivotally mounted and having a stopper pin (8) at one end, and the stopper pin (8) of the rotating member (6) is provided from the sector gear side. A slide hole 7 for guiding the stopper pin 8 is formed at a position where the sector gear is locked when the stopper pin 8 moves to the seat back side and the stopper pin 8 moves to the sector gear side. A spring 9 for urging the pin 8 toward the sector gear is provided, and between the other end of the rotating member 6 and the front end of the seat cushion SC,
When the seat cushion SC is in the upright state, the stopper pin 8 of the rotating member 6 is connected to the cable 10 that retracts toward the seat back side along the slide hole 7.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a front fall prevention mechanism for a retractable seat back in a vehicle seat with a slide rail.

[0002]

[Prior Art]

 BACKGROUND ART Conventionally, a vehicle seat with slide rails, particularly a rear seat, has a seat cushion SC whose front end is pivotally attached to an upper rail 2 of a slide rail 1 and which pivots from a horizontal state to an upright state, as shown in FIG. It comprises a fixed frame 3 fixed to the upper rail behind the cushion SC, and a seat back SB attached to the fixed frame 3 via a reclining device 5 having a sector gear 4, and the sector gear 4 is integrated. In such a rear seat, since the seat cushion SC is slid forward and backward by the slide rail, if the seat cushion SC is slid forward and the seat back SB is tilted forward, the tilt angle of the seat back SB is large. However, if the seat back SB is not stopped midway, the seat back SB interferes with the front seat and the seat cushion SC does not slide. Further, in the rear seat, the seat cushion SC is pivoted from the horizontal state to the upright state, the seat back SB is tilted forward in the direction of the seat cushion SC, the back surface of the seat back SB is made horizontal, and the back of the seat back SB is made. The back side is used as a luggage stand. Therefore, since the back and back of the seat back SB is used as a luggage stand, when the seat cushion SC is rotated from the horizontal state to the upright state, the seat back SB tilts forward in the direction of the seat cushion SC and, on the other hand, the seat. It is preferable that if only the back SB is tilted forward, the seat back SB stops midway and interference between the seat back SB and the front seat can be prevented. Therefore, the present invention prevents the seat back from stopping in the middle when the seat back is tilted forward, prevents interference between the seat back and the front seat, and when the back and back of the seat back is used as a luggage stand, the seat back is in front. The purpose is to collapse and use the back of the seat back as a luggage stand.

[0003]

[Means for Solving the Problems]

 According to the present invention for achieving the above object, the fixed frame is provided with a rotating member pivotally mounted at a central portion thereof and having a stopper pin at one end thereof, and the stopper pin of the rotating member is When moving from the sector gear side to the seat back side and the stopper pin moves to the sector gear side, a slide hole for guiding the stopper pin is formed at a position where the sector gear is locked, and the rotation member has a stopper. A spring for urging the pin toward the sector gear is provided, and the stopper pin of the rotating member slides between the other end of the rotating member and the front end of the seat cushion when the seat cushion stands upright. It is characterized by connecting a cable that retracts to the seatback side along the hole.

[0004]

[Action]

 When the seat back tilts forward, the sector gear rotates together with the seat back, but since the rotating member provided on the fixed frame is biased by the spring, the stopper pin is located in the slide hole on the sector gear side, and the stopper pin The sector gear is locked in. Therefore, the seat back is prevented from leaning forward, and the interference with the front seat is prevented. On the other hand, when the seat cushion is rotated from the horizontal position to the upright position, the rotating member is rotated by the cable and the stopper pin retracts to the seat back side along the slide hole, so that the sector gear is locked to the stopper pin. Never. Therefore, the seat back can be tilted forward and the back and back of the seat back can be used as a luggage stand.

[0005]

【Example】

 An embodiment according to the present invention will be described with reference to FIGS. 1 to 4. The same members as those of the conventional structure are designated by the same reference numerals and the description thereof will be omitted. The fixed frame 3 is provided with a rotating member 6 and a slide hole 7. A central portion 6a of the rotating member 6 is rotatably attached to the fixed frame 3. A stopper pin 8 projecting toward the fixed frame 3 is provided at one end 6b of the rotating member 6. The stopper pin 8 is fitted into the slide hole 7 when it moves along the slide hole 7 formed in the fixed frame 3 when the rotating member 6 rotates. The slide hole 7 is formed from the sector gear side of the fixed frame 3 to the seat back SB side along the locus of the fixed frame 3 along which the stopper pin 8 moves. That is, when the stopper pin 8 moves to the sector gear side, the slide hole 7 guides the stopper pin 8 to the position where the notched surface portion 4a of the sector gear 4 is locked to the stopper pin 8 when the stopper pin 8 moves to the sector gear side. On the other hand, when the stopper pin 8 moves to the seat back side, the notch surface 4a of the sector gear 4 does not engage with the stopper pin 8 and the sector gear 4 rotates. There is. Further, the rotating member 6 is provided with a spring 9 for urging the stopper pin 8 toward the sector gear. This spring 9 is a tension spring, one end 9a of which is locked to the fixed frame 3, the other end 9b of the spring 9 is locked between the central portion 6a of the rotating member 6 and the other end 6c, and a stopper pin is always provided. 8 is urged so that it is located on the sector gear side of the slide hole 7.

A cable is connected between the other end 6c of the rotating member 6 and the front end of the seat cushion SC. One end 10a of the cable 10 is fixed to the rotating member 6, and the other end 10b of the cable 10 is fixed to the front end of the seat cushion SC. A leg 11 is attached to a front end of the seat cushion SC, and a lower end 11a of the leg 11 is rotatably attached to an upper rail 2 of a slide rail 1. The other end 10b of the cable 10 is fixed to the substantially central portion 11b of the leg 11. The other end 10b of the cable 10 is fixed to the leg 11 via a fixing piece 12 fixed to the upper rail 2 near the leg 11.

In the above structure, when the seat back SB tilts forward, the sector gear 4 rotates accordingly, but the rotating member 6 is biased by the spring 9 and the stopper pin 8 is moved to the sector gear side of the sliding hole 7. Since it is located, the cutout surface 4a of the sector gear 4 is locked to the stopper pin 8. Therefore, the rotation of the sector gear 4 is blocked by the stopper pin 8, and the seat back SB integrated with the sector gear 4 is prevented from leaning forward. Therefore, the seat back SB does not interfere with the front seat. On the other hand, when the seat cushion SC is in the upright state, the rotating member 6 is pulled by the cable 10. Since the rotating member 6 rotates against the bias of the spring 9, the stopper pin 8 moves along the slide hole 7 and retracts to the seat back side. Even if the sector gear 4 rotates, the notch surface 4a of the sector gear 4 does not engage with the stopper pin 8. Therefore, the seat back SB is tilted forward and the back and back of the seat back SB are horizontally used for a luggage stand. can do. Further, when the seat back SB is returned to the original state and the seat cushion SC is changed from the upright state to the horizontal state, the rotating member 6 is not pulled by the cable 10. Therefore, the rotating member 6 is rotated by the urging force of the spring 9, and the stopper pin 8 moves to the sector gear side along the slide hole 7.

According to the present invention, the fixed frame is provided with a rotating member pivotally mounted in the central portion and having a stopper pin at one end, and the stopper pin of the rotating member is on the sector gear side. When the stopper pin moves to the seat back side and the stopper pin moves to the sector gear side, a slide hole for guiding the stopper pin is formed at a position where the sector gear is locked, and the rotating member has the stopper pin. A spring that biases the sector gear is provided, and between the other end of the rotating member and the front end of the seat cushion, the stopper pin of the rotating member slides into a slide hole when the seat cushion is in an upright state. When the seat back tilts forward, the sector gear rotates together with the seat back, but the fixed frame The pivoting member provided on the shaft is biased by a spring, and the stopper pin is positioned in the slide hole on the sector gear side, so the sector gear locks on the stopper pin and the forward lean of the seat back is prevented midway. Interference can be prevented. On the other hand, when the seat cushion is turned upright, the turning member is turned by the cable, and the stopper pin retracts along the slide hole toward the seat back side accordingly, so that the sector gear is locked to the stopper pin. The seat back can be tilted forward and the back and back of the seat back can be used as a luggage stand.

[Brief description of drawings]

FIG. 1 is a side view of a connecting portion between a seat back and a fixed frame using the mechanism of the present invention.

FIG. 2 is a side view showing a state in which the seat back is tilted forward in FIG.

FIG. 3 is a partial cross-sectional view taken along the line III-III in FIG.

FIG. 4 is a side view of a seat cushion using the mechanism of the present invention.

FIG. 5 is a side view of a rear seat having a conventional structure.

[Explanation of symbols]

 3 Fixed frame 4 Sector gear 6 Rotating member 7 Slide hole 8 Stopper pin 9 Spring 10 Cable

Claims (1)

[Scope of utility model registration request] 1. A seat cushion having a front end pivotally attached to an upper rail of a slide rail and rotating from a horizontal state to an upright state, a fixed frame fixed to the upper rail behind the seat cushion, and a fixed frame. In a vehicle seat with a slide rail, which is attached via a reclining device having a sector gear and which has a seat back integrally formed with the sector gear, a central portion is rotatably attached to the fixed frame and a stopper pin is provided at one end thereof. With a rotating member having
When the stopper pin of the rotating member moves from the sector gear side to the seat back side and the stopper pin moves to the sector gear side, a slide hole for guiding the stopper pin is formed at a position where the sector gear is locked. A spring for urging the stopper pin toward the sector gear is provided on the rotating member, and when the seat cushion is in an upright state, the spring is provided between the other end of the rotating member and the front end of the seat cushion. A front fall prevention mechanism for a retractable seat back, characterized in that a stopper pin of a moving member is connected to a cable for retracting to the seat back side along a slide hole.